Measuring bipartite spin correlations of lattice-trapped dipolar atoms

Youssef Aziz Alaoui; Sean R. Muleady; Edwin Chaparro; Youssef Trifa; Ana Maria Rey; Tommaso Roscilde; Bruno Laburthe-Tolra; Laurent Vernac

arXiv · 2404.10531

Measuring bipartite spin correlations of lattice-trapped dipolar atoms

Youssef Aziz Alaoui·Sean R. Muleady·Edwin Chaparro·Youssef Trifa·Ana Maria Rey·Tommaso Roscilde·Bruno Laburthe-Tolra·Laurent Vernac

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Abstract

We demonstrate a bipartition technique using a super-lattice architecture to access correlations between alternating planes of a mesoscopic array of spin-3 chromium atoms trapped in a 3D optical lattice. Using this method, we observe that out-of-equilibrium dynamics driven by long-range dipolar interactions lead to spin anti-correlations between the two spatially separated subsystems. Our bipartite measurements reveal a subtle interplay between the anisotropy of the 3D dipolar interactions and that of the lattice structure, without requiring single-site addressing. We compare our results to theoretical predictions based on a truncated cumulant expansion and a new cluster semi-classical method that we use to investigate correlations at the microscopic scale. Comparison with a high-temperature analytical model reveals quantum thermalization at a high negative spin temperature.

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Youssef Aziz Alaoui, Sean R. Muleady, Edwin Chaparro, Youssef Trifa, Ana Maria Rey, Tommaso Roscilde, Bruno Laburthe-Tolra, Laurent Vernac. 2024-04-16. Measuring bipartite spin correlations of lattice-trapped dipolar atoms. https://arxiv.org/abs/2404.10531

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